The short answer
On the TDQR line, a machine that will not start is far more often refusing to start than unable to — a door that has not latched, a control lock, or a supply it cannot see. On this page the door latch leads, because it is the interlock that stops more machines than everything else combined. Work through the interlocks before suspecting the control: they are free, immediate and account for most of these calls.
What you are seeing on the TDQR line
- The panel is completely dead — That is a supply question: the socket, the breaker or the switched spur, not the appliance.
- It beeps or flashes and cancels itself — A refusal rather than a failure, and one that usually names the interlock it is unhappy with.
- NEAR MISS — it starts, runs a few minutes and stops — That is a cycle fault, not a start fault: the machine is getting far enough to find something it does not like.
Causes, most likely first on the TDQR line
- The door is not latching fully — Ranked first on the TDQR line because no dishwasher will run with the latch switch open, and because the fault is usually a rack or a tall item stopping the door closing the last few millimetres.
- A control lock, delay or demonstration mode is active — Locks are usually cleared by holding one button for a few seconds; a delay counts down silently and looks exactly like a refusal to start.
- No power reaching the machine — Check the breaker and, where fitted, the switch above the worktop. Machines under a sink are commonly on the same circuit as a disposer.
- The water supply is closed or the machine cannot fill — Last of the supply causes, and easy to prove: open the tap under the sink and listen for the fill.
Check in this order, and why that order
- First — open the door and close it deliberately, listening for the latch — Check nothing on the top rack is holding it out. A second, softer click is the switch closing; without it nothing will run.
- Then — hold the control-lock button and check for a delayed start — Most panels clear the lock after a few seconds on one button. A delay counting down silently looks identical to a refusal.
- Only then — check the breaker and any switch above the worktop — Machines under a sink often share a circuit with a disposer. A dead panel with a healthy breaker means the spur or the socket.
- STOP here if the next check needs a panel off or a meter on live terminals — Everything above can be done with nothing dismantled; past it the checks need test equipment.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing the kick plate or the inner door panel — a capacitor can hold a charge after the power is off, and the control and heater terminals sit within reach of standing water. Close the supply shut-off under the sink before disturbing any fitting, and never reach into the sump while the machine is powered: the chopper and the drain impeller start without warning.
Where the owner job ends
Call once the door latches properly, the supply is proven and no lock or delay is set, because the next checks are a meter on the door switch and the thermal fuse behind the inner door panel. On the TDQR line, call rather than continue if the control panel has to come apart. Call immediately if the machine trips the breaker when it is switched on, or if there is any smell of burning from the door edge.
Other faults covered for the TDQR line
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
